#include <iostream>
#include <string>

const int64_t dayToSec = 24 * 60 * 60;

int64_t FromTimeToSeconds(const std::string& str) {
    int64_t h = 0, m = 0, s = 0, t = 0;
    size_t index = 0;
    std::string hours, minutes, seconds;
    int counter = 0;
    for (char i : str) {
        if (i == ':') {
            counter++;
        }
    }
    if (counter == 2) {
        while (str[index] != ':') {
            hours += str[index];
            index++;
        }
        index++;
        for (char hour : hours) {
            h = h * 10 + static_cast<int>(hour) - '0';
        }
        t += h * 60 * 60;
    }
    if (counter >= 1) {
        while (str[index] != ':') {
            minutes += str[index];
            index++;
        }
        index++;
        for (char minute : minutes) {
            m = m * 10 + static_cast<int>(minute) - '0';
        }
        t += m * 60;
    }
    while (index < str.size()) {
        seconds += str[index];
        index++;
    }
    for (char second : seconds) {
        s = s * 10 + static_cast<int>(second) - '0';
    }

    return t + s;
}

std::string timerAlarm(int64_t start, int64_t timer) {
    std::string result;
    int64_t days = 0;
    int64_t time = (start + timer) % (dayToSec);

    if (time < start) {
        ++days;
    }

    days += timer / dayToSec;

    int64_t hours = time / (60 * 60);
    int64_t minutes = (time % (60 * 60)) / 60;
    int64_t seconds = time % 60;
    if (hours < 10) {
        result += '0';
    }
    result += (std::to_string(hours) + ':');
    if (minutes < 10) {
        result += '0';
    }
    result += (std::to_string(minutes) + ':');
    if (seconds < 10) {
        result += '0';
    }
    result += std::to_string(seconds);
    if (days >= 1) {
        result += ("+" + std::to_string(days) + " days");
    }
    return result;
}


int main() {
    std::string start;
    std::string timer;


    std::cin >> start;
    std::cin >> timer;

    int64_t int_start = FromTimeToSeconds(start);
    int64_t int_timer = FromTimeToSeconds(timer);

    std::cout << timerAlarm(int_start, int_timer);

    return 0;
}